-- Column kernels (src/col/kern*.c): every SIMD level is bit-identical to the scalar specification on random inputs of every
-- slot (all widths, boundary thresholds, unaligned starts, n in 0..5000, garbage in the padding). A level the CPU lacks runs the
-- best one below it, so the output does not depend on the host.
CREATE EXTENSION pg_sift;
CREATE EXTENSION pg_sift_test;
SELECT sift._test_col_kernels(0, 1) AS scalar_1, sift._test_col_kernels(0, 2) AS scalar_2 \gset
SELECT :scalar_1 <> :scalar_2 AS seeds_differ;
 seeds_differ 
--------------
 t
(1 row)

SELECT l AS level, sift._test_col_kernels(l, 1) = :scalar_1 AND sift._test_col_kernels(l, 2) = :scalar_2 AS same_as_scalar
FROM generate_series(1, 2) l ORDER BY l;
 level | same_as_scalar 
-------+----------------
     1 | t
     2 | t
(2 rows)

-- The dispatch follows sift.simd
SET sift.simd = scalar;
SELECT sift._test_col_level() AS level, sift._test_col_kernels_active(1) = :scalar_1 AS same_as_scalar;
 level  | same_as_scalar 
--------+----------------
 scalar | t
(1 row)

SET sift.simd = avx2;
SELECT sift._test_col_level() IN ('scalar', 'avx2', 'neon') AS level_capped, sift._test_col_kernels_active(2) = :scalar_2 AS same_as_scalar;
 level_capped | same_as_scalar 
--------------+----------------
 t            | t
(1 row)

SET sift.simd = avx512;
SELECT sift._test_col_level() IN ('scalar', 'avx2', 'avx512', 'neon') AS level_known, sift._test_col_kernels_active(1) = :scalar_1 AS same_as_scalar;
 level_known | same_as_scalar 
-------------+----------------
 t           | t
(1 row)

RESET sift.simd;
SELECT sift._test_col_level() IN ('scalar', 'avx2', 'avx512', 'neon') AS level_known, sift._test_col_kernels_active(2) = :scalar_2 AS same_as_scalar;
 level_known | same_as_scalar 
-------------+----------------
 t           | t
(1 row)

DROP EXTENSION pg_sift_test;
DROP EXTENSION pg_sift;